Numerical simulation of three dimensional oscillatory flow in half-zone bridges of low P[lc]r fluids

Material type: 文書・図像類

Author: 今石, 宣之ほか

Publisher: 宇宙開発事業団

Publication date: 2002-12-27

Material Format: Digital

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Note (General)：: Several sets of numerical simulations were conducted to give realistic understandings of oscillatory Marangoni convection in half-zone liquid bridges ...

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Material Type: 文書・図像類
Title: Numerical simulation of three dimensional oscillatory flow in half-zone bridges of low P[lc]r fluids
Author/Editor: 今石, 宣之
安廣, 祥一
依田, 真一
Imaishi, Nobuyuki
Yasuhiro, Shoichi
Yoda, Shinichi
Author Heading: 今石, 宣之
安廣, 祥一
依田, 真一
Imaishi, Nobuyuki
Yasuhiro, Shoichi
Yoda, Shinichi
Publication, Distribution, etc.: 宇宙開発事業団
Publication Date: 2002-12-27
Publication Date (W3CDTF): 2002-12-27
Alternative Title: 低Pr数流体のハーフゾーン橋中の3次元振動流の数値シミュレーション
Periodical title: 宇宙開発事業団技術報告: Marangoni Convection Modeling Research: Annual Report April 1, 2001-March 31, 2002 = NASDA Technical Memorandum: Marangoni Convection Modeling Research: Annual Report April 1, 2001-March 31, 2002
Pages: 129-155
ISSN (Periodical Title): ISSN : 1345-7888
Text Language Code: eng
Subject Heading: Marangoni対流
数値シミュレーション
ハーフゾーン液橋
Prandtl数
熱伝導
微小重力
熱毛細管流
液体金属
Marangoni数
Marangoni convection
numerical simulation
half-zone liquid bridge
Prandtl number
heat conduction
microgravity
thermocapillary flow
liquid metal
Marangoni number
Target Audience: 一般
Note (General): Several sets of numerical simulations were conducted to give realistic understandings of oscillatory Marangoni convection in half-zone liquid bridges of low Prandtl number fluid with various aspect ratios (from 0.6 to 2.2). Special emphasis was placed on the effects of the less-conductive supporting rods on the transition from axisymmetric steady flow to three dimensional steady and also to oscillatory three dimensional flow. The new simulation results revealed that the conductive heat transfer through the small gaps (1 mm in total) between the melt/rod interface and the temperature measuring points causes significant temperature drop which provide with serious error in estimating Marangoni numbers. This conductive temperature drop is the major reason of the discrepancy between the numerical results in preceding years and the experimental results obtained in NASDA. The effect of the finite conductivity of the rods causes additional effect through the non-uniform temperature distributions on the melt/rod interface. This effect is not negligible but yet minor.
資料番号: AA0045403005
レポート番号: NASDA-TMR-020026E
Access Restrictions: 限定公開
Periodical Title (NCID): AN00364784
https://ci.nii.ac.jp/ncid/AN00364784
Data Provider (Database): 国立情報学研究所 : 学術機関リポジトリデータベース（IRDB）（機関リポジトリ）
https://irdb.nii.ac.jp
Original Data Provider (Database): 宇宙航空研究開発機構 : 宇宙航空研究開発機構リポジトリ